.authenticateBtn{
    border-radius: 4px;
    height: 45px;
    line-height: 45px;
    text-align: center;
    font-size: 16px; 
    width: 100%;
    display: block;
    cursor: pointer; 
}
.authenticateBtnBox{
    /*position: fixed;*/
    bottom: 0;
    left: 0;
    width:100%;
    padding: 10px; 
}
.authenticateStepsBox>div{
    float: left;
    text-align: center;
    width: 33.3%;
}
.authenticateInputBox input{
    color: #727272;   
    width: 55%; 
    height: 45px;
    line-height: 45px;      
}
.authenticateInputBox label{
    display: block;
    float: left;
    width: 2.5rem;
}